.del{
	text-decoration: none;
	width:50px;
    height: 30px;
    border-radius: 5px;
    margin-left:30px;
    padding:5px;
    color:white;
    background-color:red;
}
td{
	border:1px solid black;
}
.add{
	text-decoration: none;
	width:50px;
    height: 30px;
    border-radius: 5px;
    margin-left:30px;
    padding:5px;
    color:white;
    background-color:green;
}
#cov{
	width:100%;
	height:100%;
	background: rgba(0, 0, 0, 0.4);;
	position: fixed;
    top: 0px;
    left: 0px;
    right: 0px;
    bottom: 0px;
    z-index:9999;
    display:none;
}
#hid{
	padding:40px;
    font-size: 20px;
    width: 200px;
    height: 200px;
    border-radius: 10px;
    background-color: white;
    overflow: hidden;
    display: none;
    position: fixed;
    top: 0px;
    left: 0px;
    right: 0px;
    bottom: 0px;
    margin: auto;
}